Yesterday, Dell said that it would start offering a shock-resistant hard drive on select laptop computers. For an additional $129 customers can add a shock-resistant 30 GB hard drive to the Dell Latitude D610 and the Precision M20 laptops. The enclosure of the rugged hard drive is lined with a special dampening material that can increase shock resistance up to 145 percent over drives without the material, according to company tests.

Dell's systems are designed to survive a variety of bumps, drops and shakes, temperature extremes and even some liquid spills on the keyboard and undergo more than 10,000 hours of testing during product development, the company said.